Stopping chafing comes down to reducing three things: friction, moisture, and skin-on-skin contact. Whether you’re dealing with thigh rub on a hot day or raw nipples after a long run, the fix is some combination of lubrication, the right clothing, and keeping your skin dry. Minor chafing typically clears up within a few days once you remove the cause and let the skin heal.
Why Chafing Happens
Chafing is surface-level skin damage caused by repetitive rubbing. Skin drags against skin or fabric, and over time the top layer breaks down. Moisture makes it worse because wet skin has a higher friction coefficient than dry skin. Sweat also leaves behind salt crystals as it evaporates, which act like fine sandpaper against already-irritated tissue.
The most common spots are inner thighs, underarms, nipples, the groin area, and under the breasts. Anywhere two surfaces press and slide repeatedly is vulnerable, especially in heat or during exercise. Body size, clothing fit, and how much you sweat all influence your risk.
Barrier Products That Reduce Friction
Anti-chafe balms and lubricants create a slippery layer between skin surfaces so they glide instead of grinding. Petroleum jelly is the classic option and works well for shorter activities. It’s cheap, widely available, and effective, but it can feel greasy, stain clothes, and break down faster during prolonged sweating.
Dry-formula anti-chafe sticks (like Body Glide) use skin protectants such as allantoin in a non-greasy base that goes on more like a deodorant stick. These are petroleum-free and tend to last longer during extended exercise without leaving residue on clothing. For most people, either type works. The best one is whichever you’ll actually apply before heading out.
Apply your barrier product generously to clean, dry skin before activity. If you’re exercising for more than an hour or two, you may need to reapply. Carry a small stick or packet with you on long runs or hikes.
Clothing Choices That Matter
Fabric selection is one of the most effective ways to prevent chafing, and the key factor is fit. Loose clothing that shifts and bunches creates more friction than snug, body-hugging layers. Compression shorts, fitted boxer briefs, and form-fitting base layers hold fabric in place against the skin so it moves with you rather than against you.
For exercise, look for synthetic moisture-wicking fabrics like polyester or nylon blends designed to pull sweat away from your skin and spread it across a larger surface area so it evaporates faster. Cotton absorbs moisture and holds it against your body, which increases friction over time. For everyday wear, cotton breathes well and stays comfortable in moderate conditions, but during intense activity or heavy sweating it becomes a liability.
Seams and tags are another overlooked source of friction. Flatlock seams (where the stitching sits flush against the fabric rather than raised) reduce irritation significantly. Many running and cycling garments are designed this way. If a shirt or pair of shorts has a rough internal seam that hits a chafe-prone area, that garment will cause problems no matter what fabric it’s made from.
Keeping Skin Dry
Moisture control is the other half of the equation. Some people use powders to absorb sweat in areas like the groin and inner thighs. Cornstarch-based powders are generally considered safer than talc-based products. The International Agency for Research on Cancer classifies talc-based powder applied near the genitals as “possibly carcinogenic,” and the American Academy of Pediatrics has recommended against talc powders for years due to both cancer concerns and inhalation risks.
That said, even cornstarch powder carries some respiratory risk if inhaled, and many dermatologists suggest it’s usually unnecessary if you’re using proper barrier products and moisture-wicking clothing. If you do use powder, apply it carefully to avoid breathing it in, and consider it a supplement to other strategies rather than your primary defense.
Preventing Nipple Chafing
Nipple chafing deserves its own mention because it’s a distinct problem with a specific fix. It’s especially common in male runners, where a shirt repeatedly drags across the chest over miles. The solution is a physical barrier rather than lubrication alone. Adhesive nipple covers or strips designed for runners stay in place for 10 or more miles, even in extreme heat and humidity, and peel off without pulling hair or skin.
Medical tape or small adhesive bandages work in a pinch, though they tend to lose adhesion once saturated with sweat. Anti-chafe balm applied to the nipples before a run helps for shorter distances but often isn’t enough for half-marathon or marathon efforts. Many distance runners use both tape and balm together for extra protection.
How to Treat Chafed Skin
Once chafing has happened, the priority is to stop the friction, clean the area, and protect it while it heals. Wash the irritated skin gently with mild soap and water. Pat it dry completely, then apply aloe vera gel followed by a thin layer of petroleum jelly. The aloe soothes inflammation while the petroleum jelly forms a protective barrier that prevents further irritation from clothing.
Minor chafing typically heals within a few days. During that time, wear loose, soft clothing over the affected area and avoid the activity that caused it. If the skin is raw or weeping, keep it clean and dry and let it air out when possible. Avoid re-applying friction to the same spot before it’s fully healed, because damaged skin breaks down much faster the second time.
When Chafing Becomes Something Else
Simple chafing looks red and feels sore, like a mild rug burn. It improves steadily once you remove the cause. If your symptoms don’t improve within a few days, or if they get worse, something else may be going on.
Intertrigo is a related condition where skin folds stay warm, moist, and pressed together for extended periods. It looks similar to chafing (red, irritated patches in skin folds) but often develops scaling around the edges. Intertrigo can become a breeding ground for yeast or bacterial infections, especially in the groin, under the breasts, or in abdominal folds.
Signs that a secondary infection has developed include a foul smell, small raised bumps or pustules surrounding the red area (called satellite lesions), or the formation of thickened plaques. Yeast infections in skin folds are common and typically cause those characteristic satellite bumps. Bacterial infections may produce more defined plaques or even abscesses. If you notice any of these signs, the chafing has progressed beyond what lubricant and rest can fix, and you’ll likely need a prescription antifungal or antibiotic cream to clear it.